JPH0942816A - Controller for cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable stopping or restarting of the operation of a cooler optionally with a simple operation. SOLUTION: A controller 1 is provided with microcomputers 2 and 3 to control the operation of a cooler based on the temperature in a storage and the microcomputers 2 and 3 stop the operation of the cooler forcibly based on a specified stopping operation with a stop switch 13 while releasing the forced stoppage thereof based on a specified return operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated freezer for storing food or other articles while cooling them, or
Prefabricated refrigerator (hereinafter referred to as prefabricated refrigerator / refrigerator)
The present invention relates to a cooling storage control device.

[0002]

2. Description of the Related Art Conventionally, a cooling storage such as a prefabricated freezer / refrigerator of this type is provided with a cooling device as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-35928 (F25B1 / 00). The cold air is circulated in the refrigerator to freeze or store the stored food, plants such as flowers, and other articles.

Further, when a worker enters the prefabricated freezer / refrigerator in order to carry in the work, the workability is deteriorated due to the cold air from the cooling device. When the staff entered the warehouse, they opened the breaker and forcibly stopped the operation of the prefabricated refrigerator / freezer.

[0004]

As described above, in the prior art, when the worker entered the warehouse, the breakers were opened one by one to stop the operation of the prefabricated refrigerating / refrigerating machine, which makes the operation extremely complicated. Since the breaker that should not be touched often had to be opened, there was a high risk of electric shock.

Further, since the operation of the prefabricated freezer / refrigerator is stopped, the heat generation is stopped also in equipment other than cooling, for example, the crankcase heater of the compressor of the cooling device. This heater has a function of keeping the oil temperature higher than the ambient temperature by about 10 ° C. or more before starting the compressor in order to prevent oil forming when the compressor is restarted. If the operation of the refrigerator is stopped, there is a problem in that the worker may have trouble when reuniting the operation after leaving the refrigerator.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and provides a cooling storage control device capable of arbitrarily stopping and restarting the operation of a cooling device by a simple operation. It is provided.

[0007]

The control device according to the first aspect of the present invention is used for a cooling storage which cools the inside of a refrigerator by a cooling device, and controls the operation of the cooling device based on the temperature inside the refrigerator. The control means forcibly stops the operation of the cooling device based on a predetermined stop operation by the switch and releases the forced stop based on a predetermined return operation.

The control apparatus according to the second aspect of the present invention is used for a cooling storage box in which the inside of a refrigerator is cooled by a cooling device, and is provided with control means for controlling the operation of the cooling device based on the temperature inside the refrigerator. The control means forcibly stops the operation of the cooling device for a certain period of time based on a predetermined switch operation, and releases the forced stop after the lapse of the period. In the cooling storage control device according to a third aspect of the present invention, in each of the above inventions, the control means executes the forced stop of the cooling device when the switch operation is continued for a certain period.

According to a fourth aspect of the present invention, there is provided a cooling storage control device, wherein the control means in the first or second aspect is:
The defrosting control of the cooler included in the cooling device is executed, and during the defrosting, the forced stop of the cooling device is prohibited regardless of the switch operation. In the control device for a cooling storage according to the invention of claim 5, the control means includes a defrosting timer, the defrosting of the cooler is performed at a cycle based on the count of the defrosting timer, and the defrosting is performed while the cooling device is forcibly stopped. The count is stopped without resetting the timer.

According to a sixth aspect of the present invention, there is provided a control device for use in a cooling storage, which cools the inside of a refrigerator by a cooling device, and controls the operation of the cooling device based on the temperature inside the refrigerator.
The display means, and the control means, based on a predetermined switch operation, forcibly stop the operation of the cooling device, and a stop function for canceling the forced stop by a predetermined return operation,
The operation of the cooling device is forcibly stopped for a certain period of time, and a temporary stop function for canceling the forced stop after the lapse of the period is executed, and the display means is turned on while the temporary stop function is being executed, and the stop function is executed. The display means is blinked during execution of.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a cooling storage control device 1 of the present invention, and FIGS. 2 and 3 are flowcharts showing programs of microcomputers 2 and 3 of the control device 1. The control device 1 of the embodiment controls the operation of a prefabricated freezer / refrigerator for cooling and storing articles such as foods and flowers (not shown), and the 8-bit serial communication line 4
The display substrate 6 and the control substrate 7 are connected to each other. The display substrate 6 is arranged on the outer surface near the entrance of a prefabricated freezer / refrigerator (not shown), and there is a 4-bit microcomputer 2 as a control means therein.
Is provided, and further, a plurality of operation display LEDs 10 including a display 8 including a two-digit 7-segment LED and a minus display LED, a cooling LED 5, a defrosting LED 9, a stop LED 11 as a display means, and a temporary stop LED 12.
Is provided.

Further, the display board 6 is provided with a plurality of tact switches 15 for setting including a stop switch 13, a setting dip switch 14, a communication connector 16 to a central control device, and a semi-fixed setting volume. 17
And so on. On the other hand, the control board 7 is provided in an electrical equipment box or the like, in which a 4-bit control means is provided.
A microcomputer 3 is provided, and further, a plurality of sensors 22, 25 including a temperature sensor 21 for detecting the inside of a prefabricated freezer / refrigerator, a signal output connector 23, an SSR.
A (solid state relay) 24 and an SSR output connector 26 are provided.

Further, a plurality of relays 27 to 30 for controlling energization of a compressor, a blower (not shown) of the cooling device, a defrosting heater of a cooler which is also provided in the refrigerator and also constitutes the cooling device, and the relays. The output connectors 31 to 27, a reverse phase detection circuit 32 for detecting a reverse phase connection of a three-phase AC power source to the compressor, a connector 34 for the reverse phase detection circuit 32, and the like are provided.

The operation of the above configuration will be described below. Various setting data such as the temperature inside the prefabricated freezer / refrigerator are set in the microcomputer 2 by the tact switch 15 and the DIP switch 14 of the display board 6, and the microcomputer 2 displays these data on the display 8. The data sent from the microcomputer 3 of the control board 7 (such as a reverse temperature alarm based on the temperature inside the refrigerator and the detection operation of the reverse phase detection circuit 32) is also displayed on the display 8.

The microcomputer 3 of the control board 7 is
Based on the setting data sent from the microcomputer 2 of the display board 6 and the temperature inside the chamber detected by the temperature sensor 21, the relays 27 and 28 are controlled to control the operation of the compressor and the blower, thereby Maintain the temperature at the set temperature (freezing or refrigerating temperature). Further, the microcomputer 3 has a defrosting timer as its function, and stops the operation of the compressor and the blower at a constant cycle (for example, 12 hours) counted by the defrosting timer and controls the relay 29 to control the defrosting. The heater is energized and the defrost LED 9 is turned on to defrost the cooler. The defrosting ends when the temperature of the cooler detected by the temperature sensor 22 reaches a predetermined defrosting end temperature, and the microcomputer 3 restarts the operation of the compressor and the blower again.

The above is the normal control by the microcomputer 2 and the microcomputer 3. Next, referring to FIG.
The stop function and the suspend function executed by the respective microcomputers 2 and 3 will be described with reference to the flowchart of FIG. Now, assuming that all are cleared, it is determined in step S1 whether or not the temporary stop flag is ON (set), and if not, the process proceeds to step S2 to determine whether or not the stop flag is ON. To do. If both flags are reset, the process goes to step S12 to turn on the cooling LED 5 and turn off the other operation display LEDs.

Next, in step S13, it is determined whether or not the defrosting is being performed. If not, the process proceeds to step S14 and it is determined whether or not the stop switch 13 is turned on (pushing operation). If it is not turned on, the process returns to step S1 and is repeated to execute the above-mentioned normal control. Here, when the worker enters the inside of the prefabricated freezer / refrigerator for carrying in work such as carrying in articles, the stop switch 13 of the display substrate 6 provided near the entrance is turned on (pressed). As a result, from step S14 to step S1
Then, the process proceeds to step 5, and the pause flag is set.
After that, the process proceeds from step S1 to step S6, the pause LED 12 is turned on, and other operation display LEDs are displayed.
Turns off.

Next, in step S7, it is determined whether or not the stop switch 13 has been turned on (pushed) again. If not, the process proceeds to step S9 to determine whether or not one stop time has elapsed. This pause time is counted by a pause timer which the microcomputer 2 or 3 has as its function. Then, this pause time can be appropriately changed with the semi-fixed volume 17, and here, for example, 30 minutes.
It shall be set in minutes.

Since the pause time by the pause timer has not elapsed here, step S11
Then, the output of each of the relays 27 to 30 and the SSR 24 is turned off (prohibited), and this is repeated thereafter. As a result, the compressor and the blower of the cooling device are forcibly stopped, so that the working environment of the worker who has entered the refrigerator is improved (temporary stop function).

After that, when 30 minutes have passed and the counting of the temporary stop timer is completed, steps S9 to S9 are performed.
Go to step 10, reset the pause flag, and step S1
The process returns from step 1 to step S1. Then, since the process proceeds from step S1 to step S2, the normal control is returned to the above, and the compressor and the blower of the cooling device are also returned to the cooling operation.

At this time, since the power source of the prefabricated freezer / refrigerator itself is not cut off in the present invention, the cooling operation after the recovery can be restarted smoothly and quickly. Further, it is also possible to place only the crankcase heater of the compressor in the energized state. Further, the forced stop of the compressor and the blower is automatically released 30 minutes after the stop switch 13 is turned on, so that the operability is further improved and the damage is caused by forgetting to release it after the work is completed. Can be avoided in advance.

Next, in step S14, the stop switch 13
Is turned on and the pause flag is set in step S15, and then steps S1 and S6 to step S6.
If the stop switch 13 is turned on again in step 7, that is, if the worker turns on the stop switch 13 twice in a row,
The process proceeds from step S7 to step S8 to reset the temporary stop flag and set the stop flag.

Then, in the same manner as described above, the process proceeds to step S11 and the outputs of the relays 27 to 30 and the SSR 24 are turned off.
Since F (prohibition) is performed, the compressor and the blower of the cooling device are forcibly stopped, and the working environment of the worker who has entered the warehouse is improved. Next, from step S1 to step S2, from step S2 to step S3, stop LE
While blinking D11, the other operation display LEDs are turned off. Next, in step S4, the stop switch 13 is turned on.
If it is not turned on, switch 1
Proceed to 1 to continue forced stop (stop function).

Next, when the work by the worker is completed, the stop switch 13 is turned on to proceed from step S4 to step S5, and the stop flag is reset. After that, the process returns from step S11 to step S1, and from step S1 to step S2, so that the normal control is returned to the above, and the compressor and the blower of the cooling device also return to the cooling operation.

That is, when the work in the refrigerator takes a relatively long time, the stop switch 13 is turned on twice to forcibly stop the cooling device, and the stop switch 13 is turned on again to return to the cooling operation. Will be able to. Therefore, in the present invention, it is possible to arbitrarily stop the operation of the compressor and the blower of the cooling device and restore them again by operating the simple stop switch 13.
It is possible to remarkably improve workability such as when a worker enters the warehouse, and since the power supply itself is not cut off, the cooling operation after restoration can be smoothly and quickly resumed. Also,
Since the stop LED 11 is blinked, it becomes possible for the worker to strongly recognize that the stop function is being executed, and it is possible to effectively prevent forgetting to release the stop function that is not automatically released.

Here, during execution of the temporary stop or the stop function as described above, the microcomputer 3 stops without resetting the count of the defrosting timer, and restarts the count after releasing. Therefore, even if the temporary stop or the stop function is started during the defrost cycle, the defrosting of the cooler will be performed after the remaining time is counted by the defrost timer after the recovery, so that the forced stop is performed. It is possible to avoid the inconvenience that the defrosting of the cooler disappears, to reliably execute the defrosting of the cooler, and to reliably prevent the performance of the cooling device from being deteriorated due to frost blockage or the like.

If defrosting is being performed in step S13, the process returns to step S1 without proceeding from step S13 to step S14. Therefore, even if the operator operates the stop switch 13, the operation is temporarily stopped or The stop function will not start. Therefore, during the defrosting of the cooler, the forced stop of the cooling device is prohibited regardless of the operation of the stop switch 13, so that the defrosting of the cooler is surely executed to prevent the performance of the cooling device from being deteriorated due to frost blockage or the like. You will be able to.

The step S7 or step S1
When the stop switch 13 is turned ON in step 4, the microcomputer 2 or 3 executes the program shown in FIG. That is, in step S16 of FIG.
Is turned on (pressed), and if it is turned on, the process proceeds to step S17 to count the delay timer which the microcomputer 2 or 3 has as a function. Then, in step S18, it is determined whether or not the delay time by the delay timer (for example, 5 seconds) has elapsed, and if not, the process returns to step S16.

When 5 seconds have elapsed and the count of the delay timer is completed in step S18, the process proceeds to step S19 to set a temporary stop flag or a stop flag (in step S14, this corresponds to the temporary stop flag set in step S15, In step S7, it corresponds to the stop flag set in step S8). Incidentally, in step S16, the stop switch 1
When 3 is not turned on, the delay timer is reset in step S20.

As described above, since the stop switch 13 is continuously pressed for 5 seconds and then transits to the temporary stop function or the stop function, it is possible to prevent the occurrence of damage due to an erroneous operation or forced stop due to noise. become able to. Moreover, since the operator can strongly impress the operation of the stop switch 13, it is possible to make it difficult to forget about the start of the forced stop (particularly, the stop function).

Although the present invention is applied to the prefabricated freezer / refrigerator in the embodiment, the present invention is also effective for large-scale equipment such as a refrigerated warehouse.

[0032]

As described above in detail, according to the invention of claim 1, the control means forcibly stops the operation of the cooling device on the basis of the predetermined stop operation by the switch, and on the basis of the predetermined return operation. Since the forced stop is released, it is possible to arbitrarily stop the operation of the cooling device and restore it again by a simple switch operation. Therefore, the workability when a worker enters the warehouse can be remarkably improved, and the power supply itself is not cut off, so that the cooling operation after the restoration can be restarted smoothly and quickly.

According to the second aspect of the invention, the control means forcibly stops the operation of the cooling device for a certain period of time based on a predetermined switch operation, and releases the forced stop after the elapse of the period. Similarly, it is possible to arbitrarily stop the operation of the cooling device for a certain period by a simple switch operation. Therefore, the workability when the worker enters the warehouse can be remarkably improved, and the power supply itself is not cut off, so that the cooling operation after the return can be smoothly and quickly resumed.

In particular, since the forced stop is automatically released by the control means after a lapse of a certain period from the switch operation, the operability is further improved, and the damage is caused by forgetting to release the switch after the work is completed. It is something that can be avoided. According to the invention of claim 3, in addition to the above-mentioned inventions, the control means executes the forced stop of the cooling device when the switch operation is continued for a certain period. Therefore, it is forcibly stopped due to an erroneous operation or noise. It is possible to avoid the occurrence of damage due to the loss. Also, since the switch operation can be strongly impressed to the worker, it is possible to make it easier to forget the start of the forced stop.

According to the invention of claim 4, in addition to the invention of claim 1 or 2, the control means executes defrosting control of the cooler included in the cooling device, and during this defrosting, the switch operation is performed. Since the forced stop of the cooling device is prohibited regardless of the above, it is possible to reliably perform defrosting of the cooler and prevent the performance of the cooling device from being deteriorated due to frost blockage or the like.

In particular, according to the invention of claim 5, in addition to the above, the control means is provided with a defrosting timer, performs defrosting of the cooler at a cycle based on the count of this defrosting timer, and forcibly stops the cooling device. Since I stopped the defrosting timer without resetting it,
Even when the forced stop is started during the defrost cycle, the defroster of the cooler is performed after the defrosting timer finishes counting the remaining time after the recovery.

Therefore, the inconvenience that the defrosting of the cooler disappears due to the forced stop of the cooling device is avoided, and the defrosting of the cooler is surely executed to further surely prevent the performance of the cooling device from being deteriorated due to frost blockage. You will be able to do that. According to the invention of claim 6, the display means is turned on during execution of the temporary stop function of the cooler of the invention of claim 2, and the display means is blinked during execution of the stop function of the invention of claim 1. Therefore, in addition to the inventions of claims 1 and 2, it is possible to make the worker strongly recognize that the stop function is being executed. Therefore, it is possible to effectively prevent forgetting to cancel the stop function that is not automatically canceled.

[Brief description of drawings]

FIG. 1 is a front view of a cooling storage control device according to the present invention.

FIG. 2 is a flowchart showing a program of a microcomputer of the control device.

FIG. 3 is a flow chart showing a program of a microcomputer of the control device.

[Explanation of symbols]

 1 Control Device 2, 3 Microcomputer 11 Stop LED 12 Temporary Stop LED 13 Stop Switch 21 Temperature Sensor 27-30 Relay

Claims (6)

[Claims] 1. A cooling storage cabinet in which the interior of a refrigerator is cooled by a cooling device, comprising control means for controlling the operation of the cooling device based on the temperature of the interior of the storage equipment, and the control means performs a predetermined stop by a switch. A control device for a cooling storage, wherein the operation of the cooling device is forcibly stopped based on an operation, and the forced stop is released based on a predetermined return operation. 2. A cooling storage cabinet in which the interior of a refrigerator is cooled by a cooling device, comprising control means for controlling the operation of the cooling device based on the temperature of the interior of the storage equipment, and the control means is operable for a predetermined switch operation. Based on the above, the control device for the cooling storage is characterized in that the operation of the cooling device is forcibly stopped for a certain period, and the forced stop is released after the lapse of the period. 3. The cooling storage control device according to claim 1 or 2, wherein the control means executes a forced stop of the cooling device when the switch operation is continued for a certain period of time. 4. The control means executes defrosting control of a cooler included in the cooling device, and prohibits forcible stop of the cooling device regardless of switch operation during defrosting. Alternatively, the cooling storage control device according to claim 2. 5. The control means includes a defrosting timer, performs defrosting of the cooler in a cycle based on the count of the defrosting timer, and does not reset the defrosting timer while the cooling device is forcibly stopped to count the defrosting timer. 5. The cooling storage control device according to claim 4, which is stopped. 6. A cooling storage cabinet in which the interior of a refrigerator is cooled by a cooling device, comprising control means for controlling the operation of the cooling device based on the temperature inside the compartment, and display means, the control means comprising: A stop function for forcibly stopping the operation of the cooling device based on a predetermined switch operation and canceling the forced stop by a predetermined return operation, and forcibly stopping the operation of the cooling device for a certain period of time for the period of time. And a temporary stop function for releasing the forced stop after the lapse of time, and the display means is turned on during execution of the temporary stop function, and the display means is blinked during execution of the stop function. Cooling storage control device.